CN110067311A - The connection structure and method of new-old concrete component junction - Google Patents
The connection structure and method of new-old concrete component junction Download PDFInfo
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- CN110067311A CN110067311A CN201910399373.3A CN201910399373A CN110067311A CN 110067311 A CN110067311 A CN 110067311A CN 201910399373 A CN201910399373 A CN 201910399373A CN 110067311 A CN110067311 A CN 110067311A
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- 239000004567 concrete Substances 0.000 title claims abstract description 189
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010276 construction Methods 0.000 claims abstract description 56
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 52
- 239000010959 steel Substances 0.000 claims abstract description 52
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000007569 slipcasting Methods 0.000 claims description 14
- 239000004568 cement Substances 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 230000001934 delay Effects 0.000 claims description 4
- 239000004570 mortar (masonry) Substances 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims 1
- 239000003673 groundwater Substances 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 description 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 5
- 235000017491 Bambusa tulda Nutrition 0.000 description 5
- 241001330002 Bambuseae Species 0.000 description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 5
- 239000011425 bamboo Substances 0.000 description 5
- 230000015271 coagulation Effects 0.000 description 5
- 238000005345 coagulation Methods 0.000 description 5
- 210000003205 muscle Anatomy 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000012756 surface treatment agent Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 230000035800 maturation Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
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- 229920002635 polyurethane Polymers 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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- 238000005728 strengthening Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6806—Waterstops
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The present invention provides the connection structures and method of a kind of new-old concrete component junction, including the novel concrete component and old concrete component being oppositely arranged；There are construction joints between novel concrete component and old concrete component；It is horizontally embedded in old concrete component to have the first steel bar stress, it is horizontally embedded in novel concrete component to have the second steel bar stress；First steel bar stress and the second reinforcing bar are used to support novel concrete component；First steel bar stress and the second steel bar stress are coaxially connected by reinforcing bar connector, and reinforcing bar connector is embedded in old concrete component and its end is external to the old concrete component metope opposite with novel concrete component；Old concrete component is provided with water expandable waterstop on the metope opposite with novel concrete component；Construction joint between novel concrete component and old concrete component is perfused with concrete by grouting pipe and Grouting Pipe.The present invention is suitable for the case where buried depth is larger, and level of ground water is high, and construction joint is influenced by groundwater environment for a long time.
Description
Technical field
The present invention relates to technical field of building construction, and in particular to a kind of connection structure of new-old concrete component junction
And method.
Background technique
No. eight lines of Wuhan Rail Transit are the town river Jian Guo rail traffic backbone lines important in Wuhan rail transit gauze
Road, wherein leaf of bamboo roller coaster erect-position development main road northwest corner at the turntable of Huangpu street leaf of bamboo mountain.And Wuhan Rail Transit eight
Line field field square greening landscape and the underground space are Wuhan City's subway Estate Development demonstration project and urban landscape using project
The model combined with civilian infrastructure.32356 square metres of field field square item occupied area, two layers of underground, by south in structure
Northern two sides large size modernization Commercial Complex and station main structure are linked as entirety.
It is pressed for time since No. eight lines are open to traffic, leaf of bamboo roller coaster station main structure need to construct in advance, apply to station main structure
After work, then carry out the construction of the underground commerce structure of south and north flanks.The project belongs to underground structure, and waterproof requirement is stringent,
Permanent structure seam can not be arranged in main structure, and overall structure maximum longitudinal length is 225m, maximum lateral width 120m.And it presses
" Code for design of concrete structures " GB50010-2010 (2015 revised edition) regulation, length is more than that expansion joint need to be arranged in 55m, therefore
Temperature stress is very big during the project structure use, and position punches greatly in the presence of ellipse among structure, and stress is complicated.It is comprehensive
Factors above, safety that south and north flanks property structure is connect with the station structure to complete in advance, waterproof effect directly affect rail
The normal operation of No. 8 lines of road traffic and the life security of passenger, citizen.
Currently, there are two hang-ups, first is that new-old concrete is handed over for the reinforced concrete structure of underground stage construction
The connection of interface reinforcing bar；Second is the waterproof problem of new-old concrete intersection.Traditional way be by setting post-cast strip or
Embedding re-bar technique solves the connectivity problem of the reinforced concrete structure of stage construction after person, is solved by pre-buried expansion sealing strip
The problem of construction joint waterproof.
For this project, on the one hand, station ground-connecting-wall and main structure are completed to construct in advance, and south and north flanks property foundation pit is still
It does not excavate, can not bind seam crossing steel bar stress, therefore post-cast strip can not be set in advance.On the other hand, due to basement length and width
Direction size is bigger, and Zhongting position is directly influenced by ambient temperature variation, and overall structure temperature stress is larger.It is longitudinal with
The connected beam in station need to select the steel bar stress of diameter 32mm to need to be implanted into the depth of station structure using rear embedding re-bar technique
Degree cannot be less than 850mm, and beam Reinforcement radical is more, and spacing is intensive, site operation both not can guarantee bar planting depth and
The requirement of bar planting spacing, it is even more impossible to guarantee rebar-planting quality.
The project service life is 100 years, is provided according to " concrete structure reinforcement design specification " GB50367-2013: when
When containing synthetic resin or other polymers ingredient in the reinforcement material of structure, the service life after structural strengthening is preferably pressed 30 years
Consider；And after service life expires, when the reliability determination re-started thinks that the arrangement works are normal, it may continue to extend it
Service life.This planting reinforcement is buried in underground, and anchoring adhesive is affected by environment such as underground water, soil for a long time, and the later period checks not
Just.Therefore, this project can not solve the connectivity problem of property structure and station structure by rear embedding re-bar technique.
This project bottom plate 15m located underground, rich groundwater, property and station connecting portion are faced with underground water infiltration for a long time
Saturating danger, from the point of view of the experience of the built rail traffic underground structure in Wuhan City, because of the visitors such as construction operation faciostenosis
Sight factor can not thoroughly solve the problems, such as structure construction seam infiltration only by setting expansion sealing strip.
Summary of the invention
The purpose of the present invention is to the defects of the prior art, provide a kind of connection of new-old concrete component junction
Structure and method applied to after not being available conventional bar planting or are arranged the mode of post-cast strip and carry out the steel of stage construction
Tendon concrete structure, level of ground water high, construction joint for a long time by groundwater environment influenced the case where larger to be suitable for buried depth.
The present invention provides a kind of connection structures of new-old concrete component junction, it is characterised in that including being oppositely arranged
Novel concrete component and old concrete component；There are construction joints between novel concrete component and old concrete component；Old coagulation
It is horizontally embedded in native component to have the first steel bar stress, it is horizontally embedded in novel concrete component to have the second steel bar stress；First stress
Reinforcing bar and the second reinforcing bar are used to support novel concrete component；First steel bar stress and the second steel bar stress pass through reinforcing bar connector
Coaxially connected, reinforcing bar connector is embedded in old concrete component and its end exposes to old concrete component and novel concrete structure
The opposite metope of part；Old concrete component is arranged on the metope opposite with novel concrete component along the horizontal extension direction of metope
There are water expandable waterstop and pre-buried Grouting Pipe, Grouting Pipe is communicated with pre-buried grouting pipe；Novel concrete component and old mixed
Construction joint between solidifying soil component is perfused with concrete by grouting pipe and Grouting Pipe.
In above-mentioned technical proposal, old concrete member exterior is provided with ground-connecting-wall；The construction joint is located at the upper of ground-connecting-wall
Side.
In above-mentioned technical proposal, water expandable waterstop includes twice, and upper and lower parallelly distribute on is on the metope of old concrete.
In above-mentioned technical proposal, Grouting Pipe is set to the middle line of interface between novel concrete component and old concrete component
Place, and simultaneously between twice water expandable waterstop.
In above-mentioned technical proposal, grouting pipe and the first steel bar stress or the second steel bar stress binding and fixing, slip casting steel
The exit of muscle is raised in novel concrete component and old concrete component top surface.
In above-mentioned technical proposal, old concrete component is painted with coagulation pedosphere on the metope opposite with novel concrete component
Surface treatment agent.
The present invention provides a kind of connection methods of new-old concrete component junction, it is characterised in that including following step
It is rapid:
S1. pre-buried first steel bar stress while construction old concrete component, is screwed into the first stress steel for reinforcing bar connector
Muscle one end adjacent with novel concrete component selects connector protection cap to seal reinforcing bar connector；
S2. while construction novel concrete component, the ground-connecting-wall between old concrete component and novel concrete component is cut,
Dabbing novel concrete component and the opposite metope of old concrete component, expose pre-buried reinforcing bar connector, and in old concrete
Painted concrete interfacial agents on the section that component exposes, then after being started the cleaning processing with suds to reinforcing bar connector, one by one
Second steel bar stress is screwed into reinforcing bar connector, it is ensured that plugging into, it is reliable to connect；
S3., twice water expandable waterstop up and down is set on the metope that old concrete component exposes；
S4. built-in slip casting pipe and grouting pipe；
S5. after the construction of novel concrete component finishes stopping precipitation, pass through Grouting Pipe and grouting pipe carries out old concrete
Back-grouting between component and novel concrete component at construction joint.
In above-mentioned technical proposal, in step S3, the water expandable waterstop of selection, which should have, delays swollen function, expansion in 7 days
Rate is not preferably greater than the 60% of final expansion rate, and final expansion rate is not preferably greater than 220%, and water expandable waterstop uses cement
It follows closely the metope exposed with old concrete component to fix, cement nail spacing 300mm~500mm；Water expandable waterstop uses chlorine
The metope that buna adhesive and old concrete component expose is pasted.
In above-mentioned technical proposal, in step S2, the thickness of new-old concrete component cannot be less than 100mm, install Grouting Pipe
Range old concrete component metope can not dabbing, and keep smooth, waterproof mortar can be used, and to carry out part levelling, with true
It is closely connected with the metope of old concrete component to protect any position of Grouting Pipe, it is ensured that Grouting Pipe there must not be hanging part.
In above-mentioned technical proposal, the constant spacing of Grouting Pipe is preferably 200~300mm, and constant spacing refers to fixed slip casting herein
The distance of the fixed point of pipe, fixed point are distributed along Grouting Pipe length direction；A piece note is set every 8~13m along Grouting Pipe direction
Slurry conduit is connect with Grouting Pipe, and grouting pipe draws the length outside construction joint and is not preferably less than 150mm；Grouting pipe exit is answered
Temporary plugging is carried out before grouting pipe construction and installation carries out temporary plugging, in case foreign matter enters.
The present invention connects steel bar stress using reinforcing bar connector, and technology maturation, reliable performance, joint test qualification rate is high,
It can effective transmission internal force.Using the method for reserved steel bar connector, in the case where rear bar planting and setting post-cast strip can not be used,
Can be especially larger in underground structure length-width direction length directly at effective solution construction joint the problem of internal force transmitting, it uses
In the biggish project of period temperature stress, this technology is effective against the cumulative stress at construction joint, can be effectively ensured and apply
Structure safety at work seam, and a possibility that crack is generated by temperature stress at construction joint can be greatly reduced.Pre-buried steel of the present invention
Muscle connector simple process, to neutral good, flames of anger operation, without special construction period, relative to rear bar planting and setting post-cast strip
Method, be substantially shorter the duration, reduce investment, there is significant economic benefit.The present invention is contacted in new-old concrete structure
Face twice expansion sealing strip setting up and down, the built-in slip casting pipe between expansion sealing strip are anti-for new-old concrete structure construction seam
Water provides three lines of defence, greatly reduces the possibility of the infiltration of the Underground Construction seam influenced for a long time by groundwater environment
Property.
Detailed description of the invention
Fig. 1 is for embodiment boundary of works area schematic diagram；
Fig. 2 is for schematic structural view of the invention.
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments, convenient for this hair is well understood
It is bright, but they limiting the invention.
The present invention provides a kind of connection structures of new-old concrete component junction, it is characterised in that including being oppositely arranged
Novel concrete component and old concrete component.The novel concrete component and old concrete component two parts being oppositely arranged, mainly
Because concrete component is influenced by construction site, technique etc., can not construct simultaneously or reserved steel bar setting after pour, and need to be divided to two
Secondary successive construction generates new-old concrete component two parts.Existing between novel concrete component and old concrete component can not
Reserved steel bar stress carries out the construction joint of unified binding；It is horizontally embedded in old concrete component to have the first steel bar stress, new coagulation
It is horizontally embedded in native component to have the second steel bar stress；First steel bar stress and the second reinforcing bar are used to support novel concrete component；
By effective connection of the first steel bar stress and the second reinforcing bar, the concrete parts of first after-pouring is made to form a stress entirety.
First steel bar stress and the second steel bar stress are coaxially connected by reinforcing bar connector, and reinforcing bar connector is embedded in old concrete component
Interior and its end exposes to the old concrete component metope opposite with novel concrete component；Before pouring novel concrete, chisel old
Concrete cover leaks out pre-buried reinforcing bar connector.Old concrete component edge on the metope opposite with novel concrete component
The horizontal extension direction of metope is provided with water expandable waterstop and pre-buried Grouting Pipe as first of anti-seepage underground defence line, note
Slurry pipe is communicated with pre-buried grouting pipe；Construction joint between novel concrete component and old concrete component by grouting pipe and
Grouting Pipe is perfused with concrete.New-old concrete seam crossing is between twice water expandable waterstop, built-in slip casting pipe and slip casting
Conduit, as the impervious defence line of second underground water
In above-mentioned technical proposal, old concrete member exterior is provided with ground-connecting-wall；The construction joint is located at the upper of ground-connecting-wall
Side.Because of working procedure reason, the old concrete member exterior constructed in advance is provided with the ground-connecting-wall of simultaneous construction, by ground-connecting-wall
It influences, the concrete component across ground-connecting-wall can only be divided into two parts successive construction, form same concrete component, construct in two times
New-old concrete part accept reinforcing bar and can not carry out the construction joint of unified binding.The construction joint is located above ground-connecting-wall, applies
When work novel concrete part, the ground-connecting-wall part at new-old concrete interface need to be cut.
In above-mentioned technical proposal, water expandable waterstop includes twice, and upper and lower parallelly distribute on is on the metope of old concrete.
In above-mentioned technical proposal, Grouting Pipe is set to the middle line of interface between novel concrete component and old concrete component
Place, and simultaneously between twice water expandable waterstop.
In above-mentioned technical proposal, grouting pipe and the first steel bar stress or the second steel bar stress binding and fixing, slip casting steel
The exit of muscle is raised in novel concrete component and old concrete component top surface.Grouting pipe exit exceeds young concrete
Component top surface is not preferably less than 150mm.
In above-mentioned technical proposal, old concrete component is painted with coagulation pedosphere on the metope opposite with novel concrete component
Surface treatment agent.
The present invention provides a kind of connection methods of new-old concrete component junction, it is characterised in that including following step
It is rapid:
S1. pre-buried first steel bar stress while construction old concrete component, is screwed into the first stress steel for reinforcing bar connector
Muscle one end adjacent with novel concrete component selects connector protection cap to seal reinforcing bar connector；
S2. while construction novel concrete component, the ground-connecting-wall between old concrete component and novel concrete component is cut,
Dabbing novel concrete component and the opposite metope of old concrete component, expose pre-buried reinforcing bar connector, and in old concrete
Painted concrete interfacial agents on the section that component exposes, then after being started the cleaning processing with suds to reinforcing bar connector, one by one
Second steel bar stress is screwed into reinforcing bar connector, it is ensured that plugging into, it is reliable to connect；
S3., twice water expandable waterstop up and down is set on the metope that old concrete component exposes；
S4. built-in slip casting pipe and grouting pipe；
S5. after the construction of novel concrete component finishes stopping precipitation, pass through Grouting Pipe and grouting pipe carries out old concrete
Back-grouting between component and novel concrete component at construction joint.
In above-mentioned technical proposal, in step S3, the water expandable waterstop of selection, which should have, delays swollen function, expansion in 7 days
Rate is not preferably greater than the 60% of final expansion rate, and final expansion rate is not preferably greater than 220%, and water expandable waterstop uses cement
It follows closely the metope exposed with old concrete component to fix, cement nail spacing 300mm~500mm；Water expandable waterstop uses chlorine
The metope that buna adhesive and old concrete component expose is pasted.
In above-mentioned technical proposal, in step S2, the thickness of new-old concrete component cannot be less than 100mm, install Grouting Pipe
Range old concrete component metope can not dabbing, and keep smooth, waterproof mortar can be used, and to carry out part levelling, with true
It is closely connected with the metope of old concrete component to protect any position of Grouting Pipe, it is ensured that Grouting Pipe there must not be hanging part.
In above-mentioned technical proposal, the constant spacing of Grouting Pipe is preferably 200~300mm, and constant spacing refers to fixed slip casting herein
The distance of the fixed point of pipe, fixed point are distributed along Grouting Pipe length direction；A piece note is set every 8~13m along Grouting Pipe direction
Slurry conduit is connect with Grouting Pipe, and grouting pipe draws the length outside construction joint and is not preferably less than 150mm；Grouting pipe exit is answered
Temporary plugging is carried out before grouting pipe construction and installation carries out temporary plugging, in case foreign matter enters.
As shown in Fig. 1, No. 8 line leaf of bamboo roller coaster station main structures of 1- Wuhan Rail Transit are constructed completion in advance, the north 2-
Side property structure wait for station main structure construction with the southern side 3- property structure after synchronize start to construct, form two construction joints
4 and 5.
Steps are as follows for the Specific construction of the present embodiment:
As shown in Fig. 2, when leaf of bamboo mountain main structure of constructing (old concrete component), pre-buried property structure need to be shifted to an earlier date
Steel bar stress 14 (i.e. the first steel bar stress), pre-buried length requirement be not less than tension reinforcement anchorage length, and reserved steel bar with
The adjacent one end of property structure is handled according to connector model thread, and reinforcing bar connector 13 is screwed into the first reserved steel bar stress
In, it selects connector protection cap to seal reinforcing bar connector 13, causes reinforcing bar connector tooth silk broken when preventing the later period from cutting concrete
The problems such as bad or steel bar corrosion, occurs, and after the pre-buried processing for completing reinforcing bar connector, then carries out the coagulation of station main structure
Native (i.e. old concrete component) pours.
When property main structure 9 of constructing (novel concrete component), the ground of new-old concrete member interface need to be first cut
Even wall 11, dabbing new-old concrete contact surface leak out reserved reinforcing bar connector 13, brush one of concrete interface agent 12, then use
After suds start the cleaning processing reinforcing bar connector, it is screwed into the reinforcing bar (i.e. second that north and south property is connect with station structure one by one
Steel bar stress), it is ensured that plugging into, it is reliable to connect.
It is swollen that twice chance water up and down is arranged in (i.e. the old concrete component metope opposite with novel concrete component) on the contact surface
Swollen sealing rod 15, selected water expandable waterstop, which should have, delays swollen function, and 7 days expansion rates are not preferably greater than final expansion rate
60%, final expansion rate is not preferably greater than 220%, and expansion sealing strip need to be closely connected with contact surface, fixes using cement nail, cement
Spacing 300mm~500mm is followed closely, and is pasted with neoprene adhesive, keeps only water-swellable water bar and contact surface securely closely connected.
Construction joint middle line position is preferably arranged in pre-buried one of Grouting Pipe 17 between twice water expandable waterstop, Grouting Pipe
It sets, the thickness of any side concrete cannot be less than 100mm, install the base of the range of Grouting Pipe, i.e. old concrete component is cut
At face, can not dabbing, and keep smooth, it is levelling to carry out part using waterproof mortar when necessary, to ensure any position of Grouting Pipe
It is closely connected with construction seam surface, it should be ensured that Grouting Pipe must not have hanging part.The constant spacing of Grouting Pipe is preferably 200~300mm,
It is fixed to answer securely, reliably.A grouting pipe 16 is arranged every 8~13m along Grouting Pipe direction to connect with Grouting Pipe, grouting pipe
Part in Transducers Embedded in Concrete, which should at least have, to be bound securely at one with first or second steel bar stress, and conduit is drawn outside concrete
Length not be preferably less than 150mm；Convenient, easily accessible position should be arranged in grouting pipe exit, and conduit aperture end is answered
Temporary plugging is carried out, in case foreign matter enters.Easily accessible position refers to that scene facilitates the ground for carrying out back-grouting construction operation
Side
Two at construction joint are carried out after property part-structure construction in north and south side finishes, stops precipitation, then through Grouting Pipe
Epoxy resin, polyurethane, acrylic acid also can be selected in secondary grouting, the inorganic injecting paste material such as Ying Xuanyong self-leveling cement, superfine cement
Equal chemical grouting materials, and all pre-buried Grouting Pipes should all carry out slip casting closure.
Twice expansion sealing strip+built-in slip casting pipe described above is the three lines of defence for preventing infiltration.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (10)
1. a kind of connection structure of new-old concrete component junction, it is characterised in that including the novel concrete component being oppositely arranged
With old concrete component；There are construction joints between novel concrete component and old concrete component；Level is buried in old concrete component
It is horizontally embedded in novel concrete component to have the second steel bar stress equipped with the first steel bar stress；First steel bar stress and the second reinforcing bar
It is used to support novel concrete component；First steel bar stress and the second steel bar stress are coaxially connected by reinforcing bar connector, reinforcing bar
Connector is embedded in old concrete component and its end exposes to the old concrete component metope opposite with novel concrete component；
Horizontal extension direction of the old concrete component on the metope opposite with novel concrete component along metope is provided with water-swellable and stops
Water bar and pre-buried Grouting Pipe, Grouting Pipe are communicated with pre-buried grouting pipe；Between novel concrete component and old concrete component
Construction joint concrete is perfused with by grouting pipe and Grouting Pipe.
2. the connection structure of new-old concrete component according to claim 1 junction, it is characterised in that: old concrete structure
Ground-connecting-wall is provided with outside part；The construction joint is located at the top of ground-connecting-wall.
3. the connection structure of new-old concrete component according to claim 2 junction, it is characterised in that water-swellable stops
Water bar includes twice, and upper and lower parallelly distribute on is on the metope of old concrete.
4. the connection structure of new-old concrete component junction according to claim 3, it is characterised in that Grouting Pipe is set to
The midline of interface between novel concrete component and old concrete component, and simultaneously be located at twice water expandable waterstop it
Between.
5. the connection structure of new-old concrete component according to claim 4 junction, it is characterised in that grouting pipe with
First steel bar stress or the second steel bar stress binding and fixing, the exit of slip casting reinforcing bar are raised in novel concrete component and old mixed
Solidifying soil component top surface.
6. the connection structure of new-old concrete component according to claim 4 junction, it is characterised in that old concrete structure
Part is painted with concrete interface treating agent on the metope opposite with novel concrete component.
7. a kind of connection method of new-old concrete component junction, it is characterised in that the following steps are included:
S1. construct old concrete component while pre-buried first steel bar stress, by reinforcing bar connector be screwed into the first steel bar stress with
The adjacent one end of novel concrete component selects connector protection cap to seal reinforcing bar connector；
S2. while construction novel concrete component, the ground-connecting-wall between old concrete component and novel concrete component, dabbing are cut
Novel concrete component and the opposite metope of old concrete component, expose pre-buried reinforcing bar connector, and in old concrete component
Painted concrete interfacial agents on the section exposed, then after being started the cleaning processing with suds to reinforcing bar connector, one by one by
Two steel bar stresses are screwed into reinforcing bar connector, it is ensured that plugging into, it is reliable to connect；
S3., twice water expandable waterstop up and down is set on the metope that old concrete component exposes；
S4. built-in slip casting pipe and grouting pipe；
S5. after the construction of novel concrete component finishes stopping precipitation, pass through Grouting Pipe and grouting pipe carries out old concrete component
Back-grouting between novel concrete component at construction joint.
8. the connection method of new-old concrete component according to claim 7 junction, it is characterised in that in step S3, choosing
Water expandable waterstop, which should have, delays swollen function, and 7 days expansion rates are not preferably greater than the 60% of final expansion rate, final swollen
Swollen rate is not preferably greater than 220%, and water expandable waterstop is fixed using the metope that cement nail is exposed with old concrete component, water
Mud follows closely spacing 300mm~500mm；The wall that water expandable waterstop is exposed using neoprene adhesive and old concrete component
It pastes in face.
9. the connection method of new-old concrete component according to claim 7 junction, it is characterised in that in step S2, newly
The thickness of old concrete component cannot be less than 100mm, install the old concrete component of the range of Grouting Pipe metope can not dabbing,
And keep smooth, can be used waterproof mortar carry out part it is levelling, with ensure any position of Grouting Pipe with old concrete component
Metope is closely connected, it is ensured that Grouting Pipe must not have hanging part.
10. the connection method of new-old concrete component according to claim 7 junction, it is characterised in that Grouting Pipe is consolidated
Fixed spacing is preferably 200~300mm, and constant spacing refers to the distance of the fixed point of fixed Grouting Pipe herein, and fixed point is along slip casting pipe range
Spend directional spreding；A grouting pipe is arranged every 8~13m along Grouting Pipe direction to connect with Grouting Pipe, grouting pipe extraction is applied
Length outside work seam is not preferably less than 150mm；Grouting pipe exit should temporarily be sealed before grouting pipe construction and installation
It is stifled to carry out temporary plugging, in case foreign matter enters.
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| CN112593723A (en) * | 2020-11-24 | 2021-04-02 | 浙江二十冶建设有限公司 | Existing building connecting method |
| CN112609746A (en) * | 2020-12-11 | 2021-04-06 | 中国建筑第五工程局有限公司 | New and old basement joint concrete waterproof component and construction method thereof |
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| CN110067311B (en) | 2024-04-12 |
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